Spring-wheel.



F. n, s AvA. "SPRING WHEEL.

I l i APPLICATIQN mlm APR. 19.4911` I 11,246,177. Patented. N0v.13,1917.

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5 j.; G AlK O O D 2 Z w 0 n o r 4j" o A 1J 1 5 2 Q O 9 o o o Q o 0 G o wlrn'es'ses Mza M C ATTORNEY FRED R. STAVA, 0F MILROY, MINNESOTA.

ermite-WHEEL.

Specification of Letters Patent.

Application filed April 19, 1,917. Serial No. 163,268.

To all whom t may concern: v

Be it known that I, FRED R. STAVA, a citizen of the United States, residing at Milroy, in the county of Redwood and State of Minnesota, have invented certain new and uscful Improvements in Spring-VVheels, of which the following is a specification.

This invention has reference to resilient wheels which employ than a pneumatic tube.

A prime object is to equip the wheel with a resilienclng means which will absorb shock and jar from the wheel, which will be durable, and which can be manufactured at a cost, making its commercial use practical.

Other obyects as Well as the nature, characteristic features and scope of my invention will be more readily understood from the following description taken in connection with the accompanying drawings and pointed lout in the claims forming a part or' this specification. i

Referring to the drawings:

Figure l is a fragmentary side elevational View of a spring wheel constructed in accordance with my invention.

Fig. 2 is a sectional view taken on the line 2 2 of Fig. 1, looking in the direction of the arrows.

3 is a sectional view taken on the line 3--3 of Fig. 1, looking in the direction of 'the arrows, and

Fie e is a sectional view taken on the line r-etof Fig. 2, ioolring in the direction of the arrows.

In the, drawings, a hun l 1s provided which has spokes 2 radiating thererrorn,

these being of the usual or any desired form.

Secondary spoke members are provided, and are engaged with the spokes the secondary spoke members comprising resilient arms 3,

a pair of which are engaged with each spoke.

The lower ends of the arms 3 embrace, und are rigidly secured to the spokes 2, while the opposite ends thereof entend appreciably beyond the free terminals of the spokes Q. Portions of said arms, in proximity to thc outer terminals thereof, are cnlarged and have their proximate 'faces concaved 'to provide jaws 4.

A rim structure 5 is provided comprising in this instance an outer rim upon whic is mounted a resiiient tread portion 6. inner periphery of the rim, has dcpendi therefrom, et intervals, ears or lugs l i of the ears or lugs comprises resilient a yielding agency other 4 Portions of the inne-r faces of the arms ofA each U-shaped member, are enlarged to provide jaws 8, as illustrated to advantage in Fig. 3.

An elastic element 9, Awhich in this instance comprises a helical or coil spring is passed through the jaws 4: of said'secon'dary spoke structures and`the jaws 8 of said lugs or cars '7. The spring has the ends thereof connected with nuts 10 which are mounted upon the opposite terminals of a bolt 11, the threads on the opposite ends of the latter being of a different pitch, whereby when said bolt ll is operated by a finger portion 12 or the like, movement will bc simultanen ously imparted to thev nuts 10. ln this way the tension oi the spring can be adjusted. It willvbc noted that the jaws fr and 8 are corrugated to receive the convolutions of" ratemeo Nov. 13, iol 7.

tial movement of the' latter, when pressure is exerted upon the tread 6.

Bolts i3 are mounted through said secondary spoke portions 3, mitside of, and also within the plane of the jaws 4, so as to permit snug engagement of the iat'ter with the convolutions of the spring.

Clamping riugs' are engagedwith the arms oi! said secondary soohc members 3, so as to insure positive retention ofthe lutter. "lhc rings l5 are enlarged on opposite sides of the porlions 3 in order to prevent circuiniierential movement ot' said rings. "he enlarged portions are equipped with suls'hlc bolts, whereby the rings are normally held in snugr engagement with the zneiuh 'liu Eug-s or cars 7 are also equipped with suitable boli-s, so that the jaws 8 thereof will also snugly embrace the springs, the latter boing mounted iu cmrcspoiuling C01*- rugaiions in said jai-as.

bracket lo is mounted upon the rim oogagcablc portion of each of said lugs or om' meiuiwrs "i, and is provided with a screw-thremind opening 'through which is mounted the screw-threaded shank of an uve bolt I7 mounted il the latter having a nut li wreon which abuts with the bracket 16. Metallic cable drives 19 are used, one end of each of which is engaged ywith one of the eye bolts 17, while the opposite end of each is engaged with the outermost of the bolts 13 which are carried by the secondary spoke members 3.

In use it will be seen that when ordinary pressure is exerted upon the rim or thread 5 that shock will be absorbed by the elastic element 9. However, when undue pressure is applied to said tread which would be sufiicient to'overcome Jthe resistance of the elastic element 9, this will be taken up by the metallic cables 19. Of course, the tension of the latter can be adjusted by movement of the nuts 18.

It will be understood that the above description and accompanying drawings comprehend only the general and preferred embodiment of my invention and that various minor changes in details of construction, proportion and arrangement of parts may be made within the scope of the appended claims without sacrificing any of the advantages of my invention.

I claim 1. A resilient wheel including a. hub equipped with radiating spokes, resilient arms embracing said spokes and extending beyondthe terminals of the latter, an elastie element mounted between said arms and secured thereto, and a tread engaged with said element substantially as set forth.

2. A resilient wheel including a hub, equipped with radiating spokes, resilient arms, secured to the spokes and extending outwardly beyond the terminals ot' the latter, the portions of said arms, beyond said spokes, being enlarged to provide jaws, an elastic element mounted between said jaws, and engaged with said arms:

3. A resilient wheel vincluding a hub equipped with radiating spokes, arms secured to the spokes and extending outwardly beyond the terminals of the latter, the portions of said arms, beyond said spokes.I being enlarged to provide jaws, an elastic element. mounted between said jaws, bolts to clampA saidl jaws into engagement with the elastic element, a rim in connection with said elastic element, and cables connected to said clamping bolts and extending intov engagement with said rim substantially as set forth.

In testimony where-of I aiiix my signature in presence of two witnesses.

FRED R. ,ST-AVA. IVitnesses:

S. F. Seo'r'r, H. G. CRAMER. 

